Twisting and doubling machine



T.A. AND H. A. BOYD.

TWISTING -AND DOUBLING MACHINE.

APPLICATION FILED Dc.1l.1919.

l 9384,@@1 Patemted July 12, 192i.

\ elevation and 1n TWISTING AND DOUBLING MACHINE.

Specification of Letters Patent.

Patented July 12, 1921..

Application filed December 11, 1919. Serial No. 344,264.

(GRANTED UNDER THE PROVISIONS 0F THE ACT 0F MARCH 3,

To all whom t may concern Be it known that we, THOMAS ALEXANDER BOYD and HAROLD ARTHUR BOYD, subjects of the King of the United Kingdom of Great Britain and Ireland, and residing at Glasgow, Scctland, have invented a certain new and useful Improvement in Twisting and Doubling Machines'for which we have filed applications in Great Britain, March 16, 1917, Patent No. 113,687 and in France March 16, 1918, Patent No. 489,305, of which the following is a specification.

This invention relates to detector mech-- anism for twisting and doubling machines in which a rod normally urgedupward and carrying the upper` delivery roller is normally detained against upward movement by a catch plate but is freed from the catch plate and permitted to ascend by the action of a cam on the detector in the event of breakage of the yarn.

According to the invention the detectors are fitted in a detector box forming an inten mediate member pivoted to the catch plate and adapted to act on the rod to disengage it from the catch plate on the fall of a detector into the path of the cam.

The invention also' includes improved forms of detector through which comes the yarn from the creel, such detectors being checked for engagement by a projection on the spring-pressed hinged cover of the detector box serving to maintain the detectors in working position.

The invention further includes a detector arranged to operate yon failure of the twisted yarn between the delivery roller and the twisting bobbin, such detector being removable and replaceable while the machine is working.

Figure 1 shows in side elevation the detector mechanism.

Figs. 2 and 3 show respectively in side front elevation to enlarged scale the detector box. l

Figs. 4 and 5 show, respectively, in side elevation and in front elevation a flat detector.

Figs. 6 and 7 show respectively in side elevation and in front elevation a curl detector.

Fig. 8 shows in end elevation the cover of the detector box.

1 denotes a driving cylinder, 2 a band to drive the spindle 3, 4: a band-tightening pul- 1921, 41 STAT. L., 1313.)

ley, 5 a weighted lever carrying the pulley 4, 6 an upright rod with catch 61, the rod being normally held in raised position by the weighted lever 5, 71 a catch plate, 7 the stop lever, 8 thetop rail, 9 a cam shaft and 10 and A11 upper and under delivery rollers, rThese elements are all of known construction, being disclosed for example in the specification of British Patent No. 18920 of 1888. Instead of being mounted on the rod 6, as heretofore, the detectors 12 are' carried in the upper end of the detector box 13, which is pivoted on'the rearward end 134 of the catch plate 71 and extends upward in front of the cam shaft 9. The detector box 13 has vertical slits 131 which carry the detectors 12 and hold them when sustained by the yarn over the camshaft 9. On the rear side of the detector box 13, z'. c., on the side nearest the cam shaft, is hinged a spring cover 132 to admit the detectors rand maintain them in working position. As will be evident, when a yarn fails and its detector falls into the path Yof the cam, the detector box 13 is pressed forward away from the cam shaft. Adjustably mounted in the detector box 13 at a point between rthe detectors 12 and the pivot 134K is a screw 133 disposed transversely of the cam shaft 9. The horizontal limb of the rod 6 is c ut off at a point just clear of the detector box 13 and the end 63 of the said limb is formed with a chin to receive xpressure from the screw 133 when the cam acts on a detector 12. The chin on the end 63, on rising with the rod 6, allows the point of the screw 133 to pass below it. Pressure of the screw on the chin on failure of yarn and fall of a detector forces the rod 6 outward to bring the catch 61 clear of the catch plate 71, whereupon the rod 6 rises with the following results z-lowering the lever 5 and slackening the band 2, gripping the band 2, raising the top delivery roller 10, and permitting the detector box 13 and detectors 12 to fall away from and be clear of the cam. When the rod 6 is then depressed until the catch 61 engages with the catch plate 71, the entire mechanism is again restored to working position, z'. e., the spindle band 2 is released and is tightened, the roller 10 is lowered on to the roller 11, and the detectors 12 are brought into operative relation with the cam shaft 9.

The detectors for the yarn coming from the creel may each be formed as shown at 14.in Figs. 4.and 5 of a piece of flat steel with an eye 141 at the upper lend to receive the yarn at the upper end. `Each such` detector 14 passes downward through the slitinY the vdetector AboX sothat,

`shown at 15 in Figs. 6 and 7 and checked at '152. yIn a slit in the detector box 13 is mounted a detector '16 formed ot apiece of wire comprisingia U-shaped loop having limb 161 whichslides in a slot in the detector boX 131and a:limb.162 bent outward away from thel slot in the detector box'l and away from th'ecam shaft y9 and then bent and carried downward untilit rests upon and lis sustainedclear of the cam shaft by one end 74 of the lever 7. The 'lever 7 is4pivoted'at 72 to the catch plate `71. One endof the lever 7 formsfa guide 72' tor the twisted yarn 17'coming from thedelivery rol-lers 10 and' 11. The other end 7 4 of the lever 7 projects :below the'cam shaft 9 where it is counterbalanced. The f tension of the twisted 'thread17 keeps the end 727m a downward positionfland the end 7 2 .in an upward position. It will thus beunderstood that the lever 7 ,when depressed by the tension of the twisted yarn 17, will sustain the detector 16 Y above described, and, when'the twistedV yarn 17 fails, the detector 16 will-descend into the path ofthe cam'9 and opeiate the stop-motion mechanism.V s

What we vclaim is 1. In a detector mechanism for .twisting and doubling machines, :in combination, a

rod, an upper delivery roller carried'by said rod, a catch plate normallyl detaining said -rod against movement, a'cam, ay detector'box pivoted to said catch plate, detectors in said box, said detectors normally sustained by the yarn but adapted on failure of the yarn ltoftall into the path Vof the cam, `Vand means on said detector box engagea-ble with said rod to disengage said rod from the catch platev on the :tall of adetector .into the path of the cam.A

2. In a detector mechanism for twistingv and doubling machines, in combination, a detector box formed with slits, a springpressed cover hinged .to said box, said cover having a projection, and detectors one edge for engagement 'by said projection.

A3. In a detector vmechanism for twisting and doubling machines, in combination, a lever one end otwhich riedby said'rod, a Vcatch plate vnormally detaining said yrod against movement, a cani, a detector boX pivoted to said catch plate,

said 'box tormedwith a-slot, detectors in said? detectors being removablyY i box, one of said fitted in said'slot and normally sustainedby the opposite end of saidlever clear of said mally sustained bythe yarn, but 'adapted on tailiireeof the yarn to allinto the'p'athfof said cam, and means on said detector box enaccommodated in said slits andleach checked along` serves as a yarnY guide, a rod, an upper. delivery roller carlcam, but movable;into'the-path-.of said'cam 'when said lever isvtilted on tailure'of the Y yarn, the remaining detectors being :nor

gageable with .said rod .to ldisengage said 1 red from said catch plate on movement Vvoi .a detector into the path ofsaid cam.

In testimony whereofwe have signed our names to this specification in the presence of two subscribing witnesses.

yTHoMAs ALEXANDER BOYD. HAROLD ARTHUR BOYD,V Witnesses:

VKATE FOTHERINGHAM YISABEL ROLLO. 

